EP0361488A3 - Appareil à disque magnétique ayant un circuit pour détecter la position d'informations d'asservissement enregistrées sur un disque magnétique - Google Patents

Appareil à disque magnétique ayant un circuit pour détecter la position d'informations d'asservissement enregistrées sur un disque magnétique Download PDF

Info

Publication number: EP0361488A3
Authority: EP; European Patent Office
Prior art keywords: signal; magnetic disk; servo; data; detection signal
Prior art date: 1988-09-28
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP19890118013

Other languages

German (de)

English (en)

Other versions

EP0361488A2 (fr

EP0361488B1 (fr

Inventor

Yoichi Murakami

Yoshihisa Okawa

Takao Ishikawa

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

NEC Corp

Original Assignee

NEC Corp

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1988-09-28

Filing date

1989-09-28

Publication date

1991-01-30

1989-09-28 Application filed by NEC Corp filed Critical NEC Corp

1990-04-04 Publication of EP0361488A2 publication Critical patent/EP0361488A2/fr

1991-01-30 Publication of EP0361488A3 publication Critical patent/EP0361488A3/fr

1995-04-12 Application granted granted Critical

1995-04-12 Publication of EP0361488B1 publication Critical patent/EP0361488B1/fr

2009-09-28 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

238000001514 detection method Methods 0.000 abstract 6
230000007423 decrease Effects 0.000 abstract 1

Classifications

- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
- G11B5/59633—Servo formatting

Landscapes

Moving Of The Head To Find And Align With The Track (AREA)

EP89118013A 1988-09-28 1989-09-28 Appareil à disque magnétique ayant un circuit pour détecter la position d'informations d'asservissement enregistrées sur un disque magnétique Expired - Lifetime EP0361488B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
JP63245031A JPH0291866A (ja)	1988-09-28	1988-09-28	磁気ディスク装置
JP245031/88		1988-09-28

Publications (3)

Publication Number	Publication Date
EP0361488A2 EP0361488A2 (fr)	1990-04-04
EP0361488A3 true EP0361488A3 (fr)	1991-01-30
EP0361488B1 EP0361488B1 (fr)	1995-04-12

Family

ID=17127550

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP89118013A Expired - Lifetime EP0361488B1 (fr)	1988-09-28	1989-09-28	Appareil à disque magnétique ayant un circuit pour détecter la position d'informations d'asservissement enregistrées sur un disque magnétique

Country Status (4)

Country	Link
US (1)	US5023732A (fr)
EP (1)	EP0361488B1 (fr)
JP (1)	JPH0291866A (fr)
DE (1)	DE68922171T2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP2976568B2 (ja) *	1991-03-29	1999-11-10	日本電気株式会社	フロッピイディスク装置
KR970010638B1 (ko) *	1994-05-11	1997-06-28	삼성전자 주식회사	서보 어드레스 마크 검출 보상 회로

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0005966B1 (fr) *	1978-05-30	1981-09-16	Sperry Corporation	Servosystème pour le positionnement d'un transducteur
US4390912A (en) *	1980-11-12	1983-06-28	Digital Equipment Corporation	Transducer positioning system and data disk therefor
EP0229891A2 (fr) *	1985-10-22	1987-07-29	Nec Corporation	Système de positionnement de tête pour entraînement à disque floppy
EP0249995A1 (fr) *	1986-06-19	1987-12-23	Nec Corporation	Système de positionnement de tête pour commandes de disques souples

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4549232A (en) *	1983-06-27	1985-10-22	International Business Machines Corporation	Phase modulated servo system

1988
- 1988-09-28 JP JP63245031A patent/JPH0291866A/ja active Pending
1989
- 1989-09-27 US US07/413,492 patent/US5023732A/en not_active Expired - Lifetime
- 1989-09-28 EP EP89118013A patent/EP0361488B1/fr not_active Expired - Lifetime
- 1989-09-28 DE DE68922171T patent/DE68922171T2/de not_active Expired - Fee Related

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0005966B1 (fr) *	1978-05-30	1981-09-16	Sperry Corporation	Servosystème pour le positionnement d'un transducteur
US4390912A (en) *	1980-11-12	1983-06-28	Digital Equipment Corporation	Transducer positioning system and data disk therefor
EP0229891A2 (fr) *	1985-10-22	1987-07-29	Nec Corporation	Système de positionnement de tête pour entraînement à disque floppy
EP0249995A1 (fr) *	1986-06-19	1987-12-23	Nec Corporation	Système de positionnement de tête pour commandes de disques souples

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Electronic Design vol. 36, no. 19, 25 August 1988, Hasbrouck Heights, NJ ,USA pages 83 - 90; Charles Yager: "Trim head-positioning overhead with embedded disk servo" *
PATENT ABSTRACTS OF JAPAN vol. 12, no. 192 (P-712)(3039) 04 June 1988, & JP-A-62 298068 (NEC CORP.) 25 December 1987, *

Also Published As

Publication number	Publication date
JPH0291866A (ja)	1990-03-30
EP0361488A2 (fr)	1990-04-04
DE68922171T2 (de)	1995-08-10
DE68922171D1 (de)	1995-05-18
EP0361488B1 (fr)	1995-04-12
US5023732A (en)	1991-06-11

Legal Events

Date	Code	Title	Description
1990-02-17	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1990-04-04	17P	Request for examination filed	Effective date: 19891026
1990-04-04	AK	Designated contracting states	Kind code of ref document: A2 Designated state(s): DE FR GB
1990-12-11	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1991-01-30	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): DE FR GB
1993-05-26	17Q	First examination report despatched	Effective date: 19930408
1995-02-24	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1995-04-12	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): DE FR GB
1995-05-18	REF	Corresponds to:	Ref document number: 68922171 Country of ref document: DE Date of ref document: 19950518
1995-07-28	ET	Fr: translation filed
1996-02-16	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1996-02-16	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1996-04-03	26N	No opposition filed
2002-01-01	REG	Reference to a national code	Ref country code: GB Ref legal event code: IF02
2005-08-23	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: FR Payment date: 20050823 Year of fee payment: 17
2005-09-22	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 20050922 Year of fee payment: 17
2005-09-28	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: GB Payment date: 20050928 Year of fee payment: 17
2007-04-03	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070403
2007-05-23	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 20060928
2007-06-29	REG	Reference to a national code	Ref country code: FR Ref legal event code: ST Effective date: 20070531
2007-11-24	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060928
2008-04-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20061002

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EP0260114A3 (en)	1989-04-26	Opto-magnetic signal reproducing apparatus for reading, by differential detection using a magneto-optical effect, information magnetically recorded on a record medium
JPS6467776A (en)	1989-03-14	Disk device
EP1220207A3 (fr)	2006-09-27	Unité de disque magnétique et sa commande
KR870010483A (ko)	1987-11-30	자기 디스크 장치의 기록 재생 방법 및 장치
JPS6437761A (en)	1989-02-08	Optical card device
CA2067564A1 (fr)	1992-10-31	Appareil d'enregistrement et de lecture d'informations
EP0780837A3 (fr)	2000-08-30	Support d'enregistrement sur lequel l'information est enregistré par façon intermittante et procédé et appareil de reproduction d'information
EP0361488A3 (fr)	1991-01-30	Appareil à disque magnétique ayant un circuit pour détecter la position d'informations d'asservissement enregistrées sur un disque magnétique
JPH03187040A (ja)	1991-08-15	光磁気ディスク読取り装置及び光磁気ディスクから信号を検出する方法
JPS6460860A (en)	1989-03-07	Magnetic recording and reproducing device
JPS6489083A (en)	1989-04-03	Data reproducing device
JPS5788532A (en)	1982-06-02	Recording error detection method in optical type recorder
JPS57191810A (en)	1982-11-25	Magnetic tape device capable of discriminating recording format
JPS62275304A (ja)	1987-11-30	磁気記録再生装置
CA2021681A1 (fr)	1991-01-22	Dispositif d'enregistrement et de lecture d'informations
JP2650263B2 (ja)	1997-09-03	光ディスクおよびその情報記録再生方法
JPS61280077A (ja)	1986-12-10	情報記録媒体
JPS6432467A (en)	1989-02-02	Floppy disk device
JPS57191817A (en)	1982-11-25	Magnetic tape device
JPH07235004A (ja)	1995-09-05	情報信号記録装置
JPS57191809A (en)	1982-11-25	Magnetic tape device
JPS59188844A (ja)	1984-10-26	デイスク装置